PSN-L Email List Message

Subject: meter movements as geophones
From: james fisher kd6iwd@.........
Date: Wed, 25 Jun 2003 20:13:01 -0700 (PDT)

Greetings all, I have noticed that if I connect two
meter movements together and move the meter pointer on
one meter by gently toutching the pointer and moving
it, the other meter deflects just about the same
amount as the first. The meter movements were
microampmeter types and proved to be very sensitive. I
thenk that these meter movements may prove to be a
good substitution for geophones because they use
powerful magnets and a finely wound coil in the gap
between the two magnet poles. This is the same as a
geophone except the geometry of movement is changed.
In order to convert to a geophone it only remains to
couple the meter to a pendulum of some sort.

best regards



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